← Magic number patterns lesson New set →

Magic Number Patterns Worksheet

Maths tricks trick 9: Magic number patterns · Set 974 · 40 questions
TalentJR

The trick (Spot the pattern): 37 × 3 = 111, so 37 × (3 × k) is k written three times. 12345679 × 9 = 111111111, so 12345679 × (9 × k) is k written nine times. 1 × 8 + 1 = 9, 12 × 8 + 2 = 98, 123 × 8 + 3 = 987 …; and 11 × 11 = 121, 111 × 111 = 12321.

NameDateTime takenScore ___ / 40
  1. 1.37 × 24 =
  2. 2.11 × 11 =
  3. 3.11111 × 11111 =
  4. 4.12345 × 8 + 5 =
  5. 5.12345679 × 72 =
  6. 6.37 × 21 =
  7. 7.12345679 × 36 =
  8. 8.111 × 111 =
  9. 9.12345678 × 9 + 9 =
  10. 10.12345679 × 9 =
  11. 11.1234567 × 8 + 7 =
  12. 12.1234567 × 9 + 8 =
  13. 13.111111 × 111111 =
  14. 14.12345678 × 8 + 8 =
  15. 15.1234 × 8 + 4 =
  16. 16.1111 × 1111 =
  17. 17.12345679 × 45 =
  18. 18.123456789 × 8 + 9 =
  19. 19.123456 × 9 + 7 =
  20. 20.37 × 3 =
  21. 21.12345679 × 18 =
  22. 22.12345679 × 27 =
  23. 23.1234 × 9 + 5 =
  24. 24.123 × 8 + 3 =
  25. 25.12345679 × 63 =
  26. 26.12 × 8 + 2 =
  27. 27.12345679 × 54 =
  28. 28.37 × 6 =
  29. 29.123456 × 8 + 6 =
  30. 30.123 × 9 + 4 =
  31. 31.12345 × 9 + 6 =
  32. 32.37 × 18 =
  33. 33.37 × 27 =
  34. 34.12345679 × 81 =
  35. 35.12345679 × 18 =
  36. 36.37 × 21 =
  37. 37.123 × 8 + 3 =
  38. 38.37 × 9 =
  39. 39.37 × 18 =
  40. 40.37 × 12 =

Answer key

  1. 888
  2. 121
  3. 123454321
  4. 98765
  5. 888888888
  6. 777
  7. 444444444
  8. 12321
  9. 111111111
  10. 111111111
  11. 9876543
  12. 11111111
  13. 12345654321
  14. 98765432
  15. 9876
  16. 1234321
  17. 555555555
  18. 987654321
  19. 1111111
  20. 111
  21. 222222222
  22. 333333333
  23. 11111
  24. 987
  25. 777777777
  26. 98
  27. 666666666
  28. 222
  29. 987654
  30. 1111
  31. 111111
  32. 666
  33. 999
  34. 999999999
  35. 222222222
  36. 777
  37. 987
  38. 333
  39. 666
  40. 444

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks